在 table 中动态添加行 - Bootstrap & JS

Question

我的代码需要帮助。每当用户单击添加按钮时如何添加索引号以及如何像第一行一样插入文本输入？我还在学习如何使用 JS。提前致谢！

function childrenRow() {
  var table = document.getElementById("childTable");
  var row = table.insertRow(2);
  var cell1 = row.insertCell(0);
  var cell2 = row.insertCell(1);
  var cell3 = row.insertCell(2);
  var cell4 = row.insertCell(3);
  var cell5 = row.insertCell(4);
}

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-+0n0xVW2eSR5OomGNYDnhzAbDsOXxcvSN1TPprVMTNDbiYZCxYbOOl7+AMvyTG2x" crossorigin="anonymous">

<table class="table table-bordered" id="childTable">
  <thead class="table-info">
    <tr>
      <th scope="col">No.</th>
      <th scope="col">Name</th>
      <th scope="col">School / University </th>
      <th scope="col">Year</th>
      <th scope="col">Age</th>
      <th scope=""></th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <th scope="row">1</th>
      <td class="col-sm-4">
        <input type="text" name="name" class="form-control" />
      </td>
      <td>
        <input type="text" name="school" class="form-control" />
      </td>
      <td class="col-sm-2">
        <input type="text" name="year" class="form-control" />
      </td>
      <td class="col-sm-2">
        <input type="text" name="age" class="form-control" />
      </td>
      <td>
        <input type="button" class="btn btn-block btn-default" id="addrow" onclick="childrenRow()" value="+" />
      </td>
    </tr>
  </tbody>
</table>

Answer 1

用下面的函数替换你的函数

 function deleteRow(id)
{
document.getElementById(id).remove()
}

function childrenRow() {

  var table = document.getElementById("childTable");
  // GET TOTAL NUMBER OF ROWS 
  var x =table.rows.length;
  var id = "tbl"+x;
  var row = table.insertRow(x);
  row.id=id;
  var cell1 = row.insertCell(0);
  var cell2 = row.insertCell(1);
  var cell3 = row.insertCell(2);
  var cell4 = row.insertCell(3);
  var cell5 = row.insertCell(4);
  var cell6 = row.insertCell(5);
  cell1.outerHTML = `<th> ${x}</th>`;
  cell2.innerHTML = ' <input type="text" name="name" class="form-control" />';
  cell3.innerHTML = ' <input type="text" name="school" class="form-control" />';
  cell4.innerHTML = ' <input type="text" name="year" class="form-control" />';
  cell5.innerHTML = ' <input type="text" name="age" class="form-control" />';
  cell6.innerHTML = '  <input type="button" class="btn btn-block btn-default" id="addrow" onclick="deleteRow(\''+id+'\')" value="Delete" /> '; 
}

Answer 2

检查此代码......

var i = 1;
function childrenRow() {
  i++;
  $('#childTable').find('tbody').append('<tr><th scope="row">'+i+'</th><td class="col-sm-4"><input type="text" name="name" class="form-control" /></td><td><input type="text" name="school" class="form-control" /></td><td class="col-sm-2"><input type="text" name="year" class="form-control" /></td><td class="col-sm-2"><input type="text" name="age" class="form-control" /></td><td><input type="button" class="btn btn-block btn-default" id="addrow" onclick="childrenRow()" value="+" /></td></tr>');
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-+0n0xVW2eSR5OomGNYDnhzAbDsOXxcvSN1TPprVMTNDbiYZCxYbOOl7+AMvyTG2x" crossorigin="anonymous">

<table class="table table-bordered" id="childTable">
  <thead class="table-info">
    <tr>
      <th scope="col">No.</th>
      <th scope="col">Name</th>
      <th scope="col">School / University </th>
      <th scope="col">Year</th>
      <th scope="col">Age</th>
      <th scope=""></th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <th scope="row">1</th>
      <td class="col-sm-4">
        <input type="text" name="name" class="form-control" />
      </td>
      <td>
        <input type="text" name="school" class="form-control" />
      </td>
      <td class="col-sm-2">
        <input type="text" name="year" class="form-control" />
      </td>
      <td class="col-sm-2">
        <input type="text" name="age" class="form-control" />
      </td>
      <td>
        <input type="button" class="btn btn-block btn-default" id="addrow" onclick="childrenRow()" value="+" />
      </td>
    </tr>
  </tbody>
</table>

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laravel-8